MATHS TRUE-FLASE [1 Marks Each]

A number is divisible by 4 if the last three digits form a number that is divisible by 4.

All prime numbers are coprime with each other.

Composite numbers have more than two factors.

All even numbers are prime numbers.

The common factors of 6 and 9 are 1 and 3.

The common multiples of 3 and 4 start from 12.

Numbers not divisible by 2 are called even numbers.

The largest 4-digit number divisible by 11 is 9999.

If two numbers are divisible by a number, then their sum, difference and product are also divisible by that number.

5 × 33 is the prime factorization of 165.

A number and its successor are always co-primes.

Odd numbers cannot be written as sum of primes.

Odd numbers cannot be composite.

Two consecutive numbers cannot be both primes.

An even number is composite.

The product of primes cannot be a prime.

The sum of primes cannot be a prime.

Consecutive numbers are always coprime, (whose HCF is 1)

4, 6, 7, 8 and 9 are composite numbers,

21 has 4 factors -1, 3, 7 and 21.

12 is a prime number.

There are 8 prime numbers between 1-20.

1 is a prime number.